EP 0243533 B1 19910327 - METHOD FOR MAUFACTURING WELDED PIPES
Title (en)
METHOD FOR MAUFACTURING WELDED PIPES
Publication
Application
Priority
- EP 86111988 A 19830530
- EP 83105334 A 19830530
Abstract (en)
[origin: EP0243533A1] During the process for bending the strip (1) gradually into a tubular form (10) or during the process in which the edges (7) of the strip are held in abutment against each other, the strip except its portions of the edges (7) is substantially or partially heated so that the strip except its portions of the edges is subjected to compressive stress while the portions of the edges are subjected to tensile stress, and under these conditions the edges are welded together.
IPC 1-7
IPC 8 full level
B21C 37/08 (2006.01); B23K 13/02 (2006.01); B23K 20/04 (2006.01); B23K 20/24 (2006.01); B23K 31/02 (2006.01); C21D 9/52 (2006.01)
CPC (source: EP)
B21C 37/08 (2013.01); B21C 37/0822 (2013.01); B23K 13/025 (2013.01); B23K 20/04 (2013.01); B23K 20/24 (2013.01); B23K 31/027 (2013.01); C21D 9/52 (2013.01)
Designated contracting state (EPC)
DE FR GB NL SE
DOCDB simple family (publication)
DOCDB simple family (application)
EP 86111988 A 19830530